From 0f4856495a0935d839e553db64a46cb00a0b5948 Mon Sep 17 00:00:00 2001
From: wangyidong <yidong@cnezsoft.com>
Date: Thu, 24 Dec 2015 15:07:20 +0800
Subject: [PATCH]  * fix bug #781.

---
 module/file/model.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/module/file/model.php b/module/file/model.php
index b3cdace637..1d46dd47e8 100644
--- a/module/file/model.php
+++ b/module/file/model.php
@@ -263,7 +263,8 @@ class fileModel extends model
         if(empty($data)) return '';
         $data = str_replace('\"', '"', $data);
 
-        ini_set('pcre.backtrack_limit', strlen($data));
+        $dataLength = strlen($data);
+        if(ini_get('pcre.backtrack_limit') < $dataLength) ini_set('pcre.backtrack_limit', $dataLength);
         preg_match_all('/<img src="(data:image\/(\S+);base64,(\S+))".*\/>/U', $data, $out);
         foreach($out[3] as $key => $base64Image)
         {